当人们发现引起这种病害是一种病毒时，便称它为烟草脆裂病毒。

When the cause of the disease was found to be a virus it was named tobacco rattle virus.

youdao

当人们发现引起这种病害是一种病毒时，便称它为烟草脆裂病毒。

When the cause of the disease was found to be a virus it was named tobacco rattle virus.

youdao